1" Grade 8 SAE Flat Washers, Extra Thick, 0.136" - 0.160" Thickness, Through Hardened, Grade 8 Steel, Yellow Zinc

Grade 8 Hardened Flat Washers are dimensionally similar to their USS washer counterparts, but with tighter tolerances on thickness, and manufactured from a higher grade of steel. They are to be used specifically with high-strength hardened steel bolts.